Copying very large files with Robocopy
When transferring large files with Robocopy, make sure you use the /J switch. Doing this causes Robocopy to use unbuffered I/O for the file transfer and is recommended when copying very large files. If you prefer using Xcopy you can also use the /J switch with Xcopy but only if you are using Windows Server 2008 R2.
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Mitch Tulloch is an eleven-time recipient of the Microsoft Most Valuable Professional (MVP) award and a widely recognized expert on Windows Server and cloud computing technologies. Mitch is also Senior Editor of WServerNews. For more information about him see http://www.mtit.com.